Companion PDF worksheet for Edexcel IGCSE Biology Lecture 33 - Controlling Body Temperature. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.93 - Describe the role of the skin in temperature regulation, with reference to sweating, vasoconstriction and vasodilation. Complete set of Chapter 4 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 20 - The Alveoli and Lung Disease. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.48 - Explain how alveoli are adapted for gas exchange by diffusion between air in the lungs and blood in capillaries. Specification Point 2.49 - Understand the biological consequences of smoking in relation to the lungs and the circulatory system, including coronary heart disease. Specification Point 2.50 - Practical: Investigate breathing in humans, including the release of carbon dioxide and the effect of exercise. Complete set of Chapter 3 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 10 - Nutrition in Plants. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.18 - Understand the process of photosynthesis and its importance to the conversion of light energy into chemical energy. Specification Point 2.19 - Know the word equation and balanced chemical symbol equation for photosynthesis. Specification Point 2.20 - Understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis. Complete set of Chapter 2 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 11 - The Leaf. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.21 - Describe the structure of the leaf and explain how it is adapted for photosynthesis. Specification Point 2.22 - Understand that plants require mineral ions for growth, and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids. Complete set of Chapter 2 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 15 - Digestion and Absorption. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.29 - Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases. Specification Points 2.30 and 2.31 - Understand that bile is produced by the liver and stored in the gallbladder. Understand the role of bile in neutralising stomach acid and emulsifying lipids. Specification Point 2.32 - Understand how the small intestine is adapted for absorption, including the structure of a villus. Complete set of Chapter 2 Worksheets are available.

Companion PDF worksheet for [Edexcel IGCSE Biology Lecture 16 - Energy in Food.]https://www.tes.com/teaching-resource/edexcel-igcse-biology-lecture-16-energy-in-food-12425217) Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.33B - Practical: Investigate the energy content in a food sample. Complete set of Chapter 2 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 21 - Transport Mechanisms. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.51 - Understand why simple, unicellular organisms can rely on diffusion for movement of substances in and out of the cell. Specification Point 2.52 - Understand the need for a transport system in multicellular organisms. Specification Point 2.54 - Describe the role of xylem in transporting water and mineral ions from the roots to other parts of the plant. Specification Point 2.53 - Describe the role of phloem in transporting sucrose and amino acids between the leaves and other parts of the plant. Complete set of Chapter 3 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 8 - Enzymes and pH. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.14B - Practical: Investigate how enzyme activity can be affected by changes in pH. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 9 - Movement Across Membranes. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.15 - Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells. Specification Point 2.16 - Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient. Specification Point 2.17 - Practical: Investigate diffusion and osmosis using living and non-living systems. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 4 - Cell Differentiation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 2.5B - Explain the importance of cell differentiation in the development of specialised cells. Specification Point 2.6B - Understand the advantages and disadvantages of using stem cells in medicine. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 62 - Cloning. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 5.17B - Describe the process of micropropagation (tissue culture) in which explants are grown in vitro. Specification Point 5.18B - Understand how micropropagation can be used to produce commercial quantities of genetically identical plants with desirable characteristics. Specification Point 5.19B - Describe the stages in the production of cloned mammals involving the introduction of a diploid nucleus from a mature cell into an enucleated egg cell, illustrated by Dolly the sheep. Complete set of Chapter 7 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 55 - Pollution and Global Warming. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.12 -Understand the biological consequences of pollution of air by sulfur dioxide and carbon monoxide. Specification Point 4.13 - Understand that water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse gases. Specification Point 4.14 - Understand how human activities contribute to greenhouse gases. Specification Point 4.15- Understand how an increase in greenhouse gases results in an enhanced greenhouse effect and that this may lead to global warming and its consequences. Specification Point 4.16 - Understand the biological consequences of pollution of water by sewage. Specification Point 4.17 - Understand the biological consequences of eutrophication caused by leached minerals from fertilizer. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 56 - Deforestation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.18B - Understand the effects of deforestation, including leaching, soil erosion, disturbance of evapotranspiration and the carbon cycle, and the balance of atmospheric gases. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 54 - The Nitrogen Cycle. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.11B - Describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 52 - Feeding Relationships. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.6 - Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers. Specification Point 4.7 - Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer. Specification Point 4.8 - Understand the transfer of substances and energy along a food chain. Specification Point 4.9 - Understand why only about 10% of energy is transferred from one trophic level to the next. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 53 - The Carbon Cycle. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.10 - Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 51 - Biotic and Abiotic Factors. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.5 - Understand how abiotic and biotic factors affect the population size and distribution of organism. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.3.1 - Biodiversity. Specification Point 4.7.3.2 - Waste management. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.4.1 - Trophic levels. Specification point 4.7.4.2 - Pyramids of biomass. Specification Point 4.7.4.3 - Transfer of biomass. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.5.4 - Role of biotechnology. Complete set of Chapter 7 Lectures are available.